November 7, 2014
Length: 99.875 inches
Diameter: 6.00 inches
Mass: 277.42 oz. / 17.34lbs.
Span: 13.50 inches
Center of Gravity: 56.3919
inches
Center of Pressure: 64.0575
Safety Margin: 1.28
Flight Sequence
Dual Deployment
◦ Drogue chute and
main chute
Black powder
charges will be
calculated using
vernk.com and
verified with
ground testing
Dual deployment system
Two MAWD altimeters
used for redundancy
◦ Measures barometric pressure
◦ “Mach” delay for safety
◦ Deploys drogue parachute at
apogee
◦ Deploys main parachute at
3000 ft AGL and payload
parachute at 1000ft AGL
Will be programmed and
Pre-tested for scale
launch
Airframe – carbon fiber
◦ superior strength to weight ratio
◦ Ease of workability
Fins – birch plywood in carbon fiber
◦ Combines the strength of both materials for a more rigid,
strong, and lightweight fin
Bulk-Head/Centering ring – 0.5 inch birch
plywood
◦ Cabinet quality grain, few knots, and locally available
Nosecone
◦ Will be purchased to insure proper functionality
West Systems Epoxy
◦ Used to bind the above materials together as well as
some hardware (bolts, nuts, threaded rods)
Fins – symmetric shape and quantity allows
for ease of construction, trapezoidal shape
limits potential damage to fins upon landing
Diameter – 6” diameter allows for ease of
assembly and plenty of work space.
◦ Also allows for better utilization of scrap components,
and expansion of internal components if necessary
AGSE Design
Payload securing
Critique
Score
1/5
Comments
1 = Bad
5 = Good
Is this design safe?
4
This design will allow for ease of construction and
eliminate safety concerns associated with more
complex construction methods
Altitude is expected to be reached and the design will
accommodate larger motors and payload components
Is this design limiting?
4
Does this design meet
the requirements of the
payload/rocket?
3
This current rocket design satisfies the requirements for
the projected payload.
Will this design land
safely? Parachute sizes,
impact absorbing design?
4
The current size rocket and parachutes have the rocket
descending rapidly under drogue, but slowing to under
25 ft/s under main.
Does this design
maximize performance?
3
Are the materials
selected the best for this
scenario?
Any additional
comments?
4
The rocket has been designed to accommodate the
payload as well as larger motors as the design is
refined.
Carbon fiber is a strong yet lightweight material that we
have had success with in years prior. Past experience
with phenolic tubing has yielded structural failure.
Conduct additional tests and review plan to ensure
continued safety
-------
Minimum velocity for stable flight: 25.63 ft/s
Exit rail velocity: 32.81 ft/s
A series of 3 rail beads will be used to ensure
the rocket reaches adequate speed off of the
rail while maintaining proper orientation
A series of sub-scale launches are planned
and will be conducted to verify design
Construction and test of the sub-scale will take
place from 11/23-12/14
Planning for construction of full-scale starting
12/14
At least one test flight with the final rocket will
take place
Manufacturer:
AeroTech
Mfr. Designation:
K513FJ
Motor Type:
reload
Diameter:
54.0mm
Length:
41.0cm
Total Weight:
1647g
Average Thrust:
556.8N
Maximum Thrust: 658.3N
Total impulse:
1496.3Ns
Burn Time:
2.8s
Justifications
54.0 mm diameter
allows for easy downscaling
Black Max Propellant
provides the high
visibility tracking of
dense black exhaust
S1:
340N/11.22lbs(
S2:
307/132.62oz
The handling of the motors, including purchasing and
assembly, will be under the supervision of our NDRA
members.
North Dakota Rocketry Association (NDRA) Section
#628
Certified NDRA team mentor:
◦
Dr. Tim Y. #76791 Level 2
We are planning to test fire the K513FJ motor in our
static ground test. We are not planning a test of the
sub-scale motor.
Sub-scale launch – November 22nd
Full-scale test flight #1 – February 22nd to
March 8th
Full-scale test flight #2 – March 18th to April 6th
Final launch – April 10th
Rocket launch
◦ Reaching an altitude of 3000 feet at apogee.
Rocket recovery
◦ The recovery system deploying properly at the
appropriate altitude and recovering the rocket on the
ground such that it is deemed reusable for future
launches
Payload
◦ The payload should be ejected from the rocket at
1,000 feet and return to the ground with its own
parachute.
Physics Day at UND November 12, 2012
This is a program for
local middle school to
high school students to
learn about the many
different facets of
physics.
◦ We gave a presentation
about rocketry
◦ Introduced them to the USLI
program and shared our past
history with the competition
◦ Reached about around 200
students.
Outreach at Grand Forks Area middle school
Our team is in the process of scheduling a
date to visit the local middle schools.
◦ For an entire day, we will teach a science class.
◦ Give a brief lecture about rocketry
◦ Prior to us visiting, we will have the students design
rockets out of 2 liter pop bottles.
◦ We will supervise and moderate the launch water
rockets
◦ Have a Q & A session on why some rockets did work
and other did not.
◦ Expect to reach about 30-80 students.
Astronomy Talk
Scheduled for February
◦
◦
◦
◦
Hour long lecture
Aimed at introductory level astronomy students
Content could include: History of Rocketry
By the date of the talk, we might be able to give a
demonstration of our AGSE
*The center of
gravity is forward
of the center of
pressure (closer
to the nosecone)